Are you installing the CD for the first time? Or is it asking you to re activate it again?
Make sure your computer is the same way when you originally installed it. Like with no flash drives plugged in or plugged in if one was. It asked me again so I just closed the program and took out a flash drive that was plugged in and tried again. It worked. Or you may need to connect a flash drive or printer or something that was connected when you originally installed the program. One person found to disable his virus scanner and firewall first and then it opened.
